Since the non-OS version has auto focus problem between 135mm-200mm, it would be nice to test out the OS version to see if it auto focuses correctly. If it does not autofocus correctly between 135mm-200mm, it is not the end of the world, because:
1. It is not used very often for this range.
2. I can semi manually focus in this range (I do it this way: auto focus at 135mm, then, zoom to 200mm).